Message clarification.

run_tests.py

@@ -256,10 +256,10 @@ def run_tests():
     else:
         print('\nNot running Rust tests.\n')
     if len(objctests) > 0:
-        print('\nRunning extra language tests.\n')
+        print('\nRunning Objective C tests.\n')
         [run_and_log(logfile, t) for t in objctests]
     else:
-        print('\nNo extra language tests on this platform.\n')
+        print('\nNo Objective C tests on this platform.\n')
 
 def check_file(fname):
     if fname.endswith('parsetab.py'): # Autogenerated